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ENGINE DRIVEABILITY AND EMISSIONS 6E–125 6 Using the DVM and check the IAT sensor. 1. Ignition “Off”, engine “Off”. 2. Disconnect IAT sensor connector. 3. Measure the resistance of IAT sensor. Does the tester indicate standard resistance as shown Standard resistance Go to Step 7 Go to Step 12 7 Using the DVM and check the IAT sensor signal 1. Ignition “On”, engine “Off”. 2. Disconnect the IAT sensor connector. 3. Check the circuit for open circuit. Was the DVM indicated specified value? Approximately 5.0V Go to Step 10 Less than 1V: Go to Step 8 More than specified value: Go to Step 9 8 Repair the open circuit between the ECM and IAT — Verify repair Go to Step 14 9 Repair the short to voltage circuit between the ECM — Verify repair Go to Step 14 Step Action Value(s) Yes No Temperature (°C) Resistance ( Ω) (Approximately) -20 32040 0 9788 20 3516 40 1439 60 656 80 327 100 175 IAT Sensor 1 1 2 2 V C121 1 C56(J2) C121 1 22 C56(J2) C121 1 22 |